Question: What computer network protocol runs the main regulatory text of the Hypertext Transfer Protocol?
Paraphrase: What computer arrange convention runs the most administrative content of the Hypertext Exchange Protocol?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q8777 wdt:P92 ?obj . ?obj wdt:P31 wd:Q15836568 } 
Answer: WebDAV, HTTP/1.1, WebDAV Ordered Collections Protocol, WebDAV Access Control Protocol